C60 encapsulation inside single-walled carbon nanotubes using alkali-fullerene plasma method

被引:35
作者
Jeong, GH [1 ]
Hirata, T
Hatakeyama, R
Tohji, K
Motomiya, K
机构
[1] Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan
[2] Tohoku Univ, Dept Geosci & Technol, Sendai, Miyagi 9808579, Japan
关键词
carbon nanotubes; fullerene; intercalation; transmission electron microscopy;
D O I
10.1016/S0008-6223(02)00107-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
It is reported that alkali-fullerene plasmas consisting of positive alkali-metal ions, negative fullerene ions, and residual electrons are effective in encapsulating fullerenes inside sin.-le-walled carbon nanotubes (SWNTs). When positive or negative bias-voltages are applied to SWNTs in plasmas, accelerated negative fullerene or positive alkali-metal ions are irradiated to the SWNTs through the plasma sheath, respectively. Field emission gun transmission electron microscopy (FEG-TEM) clearly shows that drastic structural modifications such as severe bending of SWNT bundles. tube dislocation. and tube tip termination take place after the ion irradiation. Energy dispersive X-ray spectrometry (EDS) confirms the existence of the alkali-metal elements in the sample after the alkali-metal irradiation. In addition to this, the SWNTs encapsulating fullerene molecules are directly observed after only 1 h fullerene-ion irradiation. These results suggest that our experimental system could permit us to intercalate not only fullerenes but also other elements inside the SWNTs by the applied-bias control. Raman scattering spectroscopy is also adopted for the purpose of evaluating pure SWNTs and fullerene encapsulated SWNTs.
引用
收藏
页码:2247 / 2253
页数:7
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